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US3642077A
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Arrangement in impact piston machines for drilling and like operations, driven by a two-stroke internal combustion engine
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GB992624A
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Improved device for working-on rail tracks
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DE1196607B
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Rock drills powered by combustion of fuels
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GB921848A
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Improved cleaning device for gas passages in percussion machines
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GB815990A
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Improvements in and relating to percussion devices
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GB782029A
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Improvements in and relating to internal-combustion percussion tools
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GB718133A
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Improvements in rock-drills having an engine assembled therewith
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GB687881A
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Improvements in internal combustion engines, particularly for rock drills and the like
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GB693493A
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Improvements in or relating to rock-boring and similar machines
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GB619355A
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Improvements in or relating to the crank-cases of internal combustion engines
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GB572448A
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Improvements in or relating to rock drilling machines
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